What i believe is that there is a certain time to use sent, of course you can use it all the time but i feel there is no need for it during a reaction type period, like flipping or swimming ect.... Do you use sent on your crank baits? Now in the winter time or middle of summer when the fish are deep and slugish i like to use a sent on my baits. When i sell my baits they are sent free as with my experience everyone likes different sents so they can just use whatever they like if they feel the need. When i do use sent i cook it in (4 drops per 6oz) and also i just add a few drops into the bag. Also think about power bait or yum F.T.P. they cook there sents into the bait and i do think there sents do produce more bites than without. JMO